针对目前国内盐化工企业生产氯化钾的主要生产工艺存在的不足与可改进方面,开发研究了“冷分解-筛分法”新工艺,节约投入,避免浮选剂的残留。实验结果表明,察尔汗盐湖和大浪滩盐湖光卤石原矿粒径大于0.246 mm,常温分解后,固相中氯化钾的粒径集中在0.1 mm左右,通过优选筛分目数,发现在使用0.246 mm的标准筛进行振动湿筛分时,氯化钾取得率为81.0%,氯化钠分离率为88.8%,溶解在分解液中的氯化钠为6.6%,取得最优结果。实验证明了“冷分解-筛分法”新工艺的可行性。

Aiming at the shortage and potential of the common used process for producing potassium chloride in Chinese salt chemical industry currently,a new technology named cold-secomposition-aieving was designed to decrease investment cost and avoid chemical residue.Experiment results showed that after the raw carnallite ores with the particle diameter above 0.246 mm from Chaerhan Salt Lake and Dalangtan Salt Lake decompose at ambient temperature the mean particle diameter of potassium chloride was about 0.1 mm,the optimal result was discovered through serial experiments of screening mesh num-ber,when the mesh size of 0.246 mm was chosen,the yield of potassium chloride was 81.0%,the separation rate of sodium chloride was 88.8% and the sodium chloride dissolved in the decomposition solution was 6.6%.It was proved that the new process of cold-secomposition-aieving method is feasible in the experiment.